Determination of regional land surface heat fluxes over a heterogeneous landscape of the Jiddah area of Saudi Arabia by using Landsat‐7 ETM data |
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Authors: | Yaoming Ma Hui Tian Hirohiko Ishikawa Ryohji Ohba Hiromasa Ueda Jun Wen |
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Institution: | 1. Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing 100085, People's Republic of China;2. Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, People's Republic of China;3. Disaster Prevention Research Institute, Kyoto University, Uji, Kyoto 611, Japan;4. Nagasaki R&D Center, Mitsubishi Heavy Industries, LTD, Fukahorimachi 5‐717‐1, Nagasaki, Japan |
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Abstract: | In this study, a parameterization method based on Landsat‐7 Enhanced Thematic Mapper (ETM) data and field observations is presented and tested for deriving the regional land surface variables, vegetation variables and land surface heat fluxes over a heterogeneous landscape. As a case study, the method and two Landsat‐7 ETM images are applied to the Jiddah area of Saudi Arabia. The regional distribution maps of surface reflectance, normalized difference vegetation index, modified soil adjusted vegetation index (MSAVI), vegetation coverage, leaf area index, surface temperature, net radiation flux, soil heat flux, sensible heat flux and latent heat flux have been determined over the Jiddah area. The derived results have been validated by using the ‘ground truth’. The results show that the more reasonable regional distributions of land surface variables (surface reflectance, surface temperature), vegetation variables (MSAVI and vegetation coverage), net radiation, soil heat flux and sensible heat flux can be obtained by using the method proposed in this study. Further improvement of the method is also discussed. Copyright © 2006 John Wiley & Sons, Ltd. |
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Keywords: | Landsat‐7 ETM regional land surface heat flux arid area Jiddah Saudi Arabia |
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